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[Fracture resistance of teeth restored with one-piece computer aided design and manufacture zirconia posts and cores: an in vitro study].
Beijing Da Xue Xue Bao Yi Xue Ban. 2014 Feb 18; 46(1):81-5.BD

Abstract

OBJECTIVE

To compare the fracture resistance of endodontically-treated teeth restored with prefabricated zirconia posts or one-piece computer aided design and computer aided manufacture (CAD/CAM) zirconia posts and cores, and unrestored endodontically-treated teeth.

METHODS

Recently extracted human maxillary central incisors (n = 36) were endodontically treated and divided into three groups (n = 12 each): group 1 was restored with prefabricated zirconia posts (Comospost) and hot pressed ceramic cores; group 2 restored with one-piece CAD/CAM zirconia posts and cores; group 3 not restored. The teeth were fixed in a universal load-testing machine; a compressive load was applied at 135 degrees to the long axis of each tooth at a crosshead speed of 1 mm/min until fracture. One-way analysis of variance (Student-Newman-Keuls) was used to determine the significance of the differences in failure load between the groups.

RESULTS

The mean fracture loads were (311.75 ± 70.12) N, (423.83 ± 54.58) N and (736.33 ± 82.91) N, respectively. The unrestored teeth exhibited significantly higher fracture resistance than the two groups of restored teeth. The teeth restored with one-piece CAD/CAM zirconia posts and cores had higher fracture resistance than the teeth restored with prefabricated zirconia posts and hot pressed ceramic cores (P < 0.001).

CONCLUSION

Within the limitations of this study, the root canal-treated teeth restored with one-piece CAD/CAM zirconia posts and cores had a significantly higher failure resistance than the teeth restored with prefabricated zirconia posts. one-piece CAD/CAM zirconia posts and cores can offer some advantages for esthetic prosthodontics.

Authors+Show Affiliations

Department of Prosthodontics,Peking University School and Hospital of Stomatology, Beijing 100081,China; First Clinical Division,PekingUnivesity School and Hospital of Stomatology, Beijing 100034,China.Second Clinical Division,Peking University School and Hospital of Stomatology,Beijing 100101,China.Department of Prosthodontics,Peking University School and Hospital of Stomatology, Beijing 100081,China.

Pub Type(s)

Journal Article

Language

chi

PubMed ID

24535354

Citation

Zhou, Tuan-feng, et al. "[Fracture Resistance of Teeth Restored With One-piece Computer Aided Design and Manufacture Zirconia Posts and Cores: an in Vitro Study]." Beijing Da Xue Xue Bao. Yi Xue Ban = Journal of Peking University. Health Sciences, vol. 46, no. 1, 2014, pp. 81-5.
Zhou TF, Zhang XF, Wang XZ. [Fracture resistance of teeth restored with one-piece computer aided design and manufacture zirconia posts and cores: an in vitro study]. Beijing Da Xue Xue Bao Yi Xue Ban. 2014;46(1):81-5.
Zhou, T. F., Zhang, X. F., & Wang, X. Z. (2014). [Fracture resistance of teeth restored with one-piece computer aided design and manufacture zirconia posts and cores: an in vitro study]. Beijing Da Xue Xue Bao. Yi Xue Ban = Journal of Peking University. Health Sciences, 46(1), 81-5.
Zhou TF, Zhang XF, Wang XZ. [Fracture Resistance of Teeth Restored With One-piece Computer Aided Design and Manufacture Zirconia Posts and Cores: an in Vitro Study]. Beijing Da Xue Xue Bao Yi Xue Ban. 2014 Feb 18;46(1):81-5. PubMed PMID: 24535354.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - [Fracture resistance of teeth restored with one-piece computer aided design and manufacture zirconia posts and cores: an in vitro study]. AU - Zhou,Tuan-feng, AU - Zhang,Xiang-fao, AU - Wang,Xin-zhi, PY - 2014/2/19/entrez PY - 2014/2/19/pubmed PY - 2015/9/9/medline SP - 81 EP - 5 JF - Beijing da xue xue bao. Yi xue ban = Journal of Peking University. Health sciences JO - Beijing Da Xue Xue Bao Yi Xue Ban VL - 46 IS - 1 N2 - OBJECTIVE: To compare the fracture resistance of endodontically-treated teeth restored with prefabricated zirconia posts or one-piece computer aided design and computer aided manufacture (CAD/CAM) zirconia posts and cores, and unrestored endodontically-treated teeth. METHODS: Recently extracted human maxillary central incisors (n = 36) were endodontically treated and divided into three groups (n = 12 each): group 1 was restored with prefabricated zirconia posts (Comospost) and hot pressed ceramic cores; group 2 restored with one-piece CAD/CAM zirconia posts and cores; group 3 not restored. The teeth were fixed in a universal load-testing machine; a compressive load was applied at 135 degrees to the long axis of each tooth at a crosshead speed of 1 mm/min until fracture. One-way analysis of variance (Student-Newman-Keuls) was used to determine the significance of the differences in failure load between the groups. RESULTS: The mean fracture loads were (311.75 ± 70.12) N, (423.83 ± 54.58) N and (736.33 ± 82.91) N, respectively. The unrestored teeth exhibited significantly higher fracture resistance than the two groups of restored teeth. The teeth restored with one-piece CAD/CAM zirconia posts and cores had higher fracture resistance than the teeth restored with prefabricated zirconia posts and hot pressed ceramic cores (P < 0.001). CONCLUSION: Within the limitations of this study, the root canal-treated teeth restored with one-piece CAD/CAM zirconia posts and cores had a significantly higher failure resistance than the teeth restored with prefabricated zirconia posts. one-piece CAD/CAM zirconia posts and cores can offer some advantages for esthetic prosthodontics. SN - 1671-167X UR - https://www.unboundmedicine.com/medline/citation/24535354/[Fracture_resistance_of_teeth_restored_with_one_piece_computer_aided_design_and_manufacture_zirconia_posts_and_cores:_an_in_vitro_study]_ L2 - http://xuebao.bjmu.edu.cn/EN/Y2014/V46/I1/81 DB - PRIME DP - Unbound Medicine ER -